I would like a japanese maple but there are so many to choose from. I
have some very specific characteristics in mind and was hoping that
someone here might know of one that would match my needs.

I'm looking for a japanese maple that would work for zone 6a, has a
weeping growth, a VERY large spread and grows at least 4', preferably
no more than 5' with 6' being that absolute largest I can go.

Any suggestions?
Thanks!
Diana